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A flash drive (also thumb drive, memory stick, and pen drive/pendrive) [1] [note 1] is a data storage device that includes flash memory with an integrated USB interface. A typical USB drive is removable, rewritable, and smaller than an optical disc , and usually weighs less than 30 g (1 oz).
An example of a USB flash drive that supported write protection via a switch is the Transcend JetFlash series. Secure Digital (SD) cards have a write-protect tab on the left side. Extensively, media that, by means of design, can't operate outside from this mode: CD-R , DVD-R , Vinyl records , etc.
Today, USB flash drives perform the same data and software storage and transfer role as the floppy disk, often used to transfer files between computers which may be on different networks, in different offices, or owned by different people. This has made USB flash drives a leading form of information system infection.
The most common data recovery scenarios involve an operating system failure, malfunction of a storage device, logical failure of storage devices, accidental damage or deletion, etc. (typically, on a single-drive, single-partition, single-OS system), in which case the ultimate goal is simply to copy all important files from the damaged media to another new drive.
Forensic disk controllers intercept write commands from the host operating system, preventing them from reaching the drive. Whenever the host bus architecture supports it the controller reports that the drive is read-only. The disk controller can either deny all writes to the disk and report them as failures, or use on-board memory to cache the ...
Flash drives adhering to the U3 specification are termed "U3 smart drives". U3 smart drives come preinstalled with the U3 Launchpad . Applications that comply with U3 specifications are allowed to write files or registry information to the host computer, but they must remove this information when the flash drive is ejected.
NOR flash memory is sometimes called flash ROM or flash EEPROM when used as a replacement for older ROM types, but not in applications that take advantage of its ability to be modified quickly and frequently. By applying write protection, some types of reprogrammable ROMs may temporarily become read-only memory.
It was introduced in 2010, [2] and is primarily designed to recover deleted or lost files from hard disk drives, USB flash drives and SSD drives with the help of Recovery Vault [3] technology. While Disk Drill was originally exclusive to the Mac, a Windows version was released in 2015.